I loved project.json but the justification was acceptable in my opinion.<p>There are literally billions of dollars of existing customer software built with CSPROJ files.<p>Moving forward with ONE file type and one set of build tools is the best for the long term ecosystem.<p>Even if it isn't the favorite choice.<p>Msbuild is open source, so there's nothing preventing a community member from adding json support back in.<p>Oh! I should add that they've committed to keeping "the good bits" of project json withing the .NetCore project files.<p>They'll be shorter, they won't require you add all existing files for compilation. Some other nice stuff (I hope NPM and SCRIPTS stays for example!)<p>Anyways, sad to lose it but in the end I think most people "get it"